21808040

素因数分解:

$2^3\times 5^1\times {\mathrm{457}}^1\times {\mathrm{1193}}^1$

素因数の和:1661

約数の個数: 32

約数和(自身を含む): 49216680

約数和(自身を除く): 27408640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 457, 914, 1193, 1828, 2285, 2386, 3656, 4570, 4772, 5965, 9140, 9544, 11930, 18280, 23860, 47720, 545201, 1090402, 2180804, 2726005, 4361608, 5452010, 10904020, 21808040]

約数ペア:

[(1, 21808040), (2, 10904020), (4, 5452010), (5, 4361608), (8, 2726005), (10, 2180804), (20, 1090402), (40, 545201), (457, 47720), (914, 23860), (1193, 18280), (1828, 11930), (2285, 9544), (2386, 9140), (3656, 5965), (4570, 4772)]